DE102013213490A1 - Pressing device with internal-axis rotary piston machine - Google Patents

Abstract

Pressing device (1) for processing of pressed material, preferably of food, in the pressing mechanism, the operating principle of the Wankel engine is used for processing the material to be pressed. The pressing mechanism has a compression housing (3) and in its interior a drivable pressing rotor (2). The pressing rotor (2) can rotate about an inner axis (4) eccentrically rotating in the press housing (3) in order to process the pressed material by means of compression pressure. Thus, the press housing (3) and the press runner (2) cooperatively form a trochoid-type internal-axis rotary piston machine. The pressing device (1) has one or more pressure compensation means (6a, 6b, 6c, 6d) either on the press rotor (2) or also on the press housing (3), so that the compression pressure occurring during the processing of the material to be pressed is regulated without the intervention of a user. The invention further relates to a press runner (2) suitable for a press device (1) and a press housing (3) suitable for a press device (1) having one or more pressure compensation means (6a, 6b, 6c, 6d), so that without Intervention of a user who regulates the compression pressure occurring during processing of the material to be pressed, and a food processor with such a pressing device (1). An achievable advantage of the present invention is that the energy requirement can be reduced.

Description

Field of the invention

The invention relates to a press rotor according to the preamble of claim 1, a press housing according to the preamble of claim 2, a pressing device according to claim 14 and a food processor according to claim 15.

Background of the invention

From the German patent application DE 18 084 20 A is a device for recovering liquid from solid, liquid-containing material of different consistency, especially known from fruits of any kind. In her a known per se internal-rotor rotary piston engine Trochoidenbauart for the recovery of liquid and the automatic ejection of the residual material from the device is applied in the cycle. In this device, in embodiments, the working surfaces of a press rotor, which together with a housing wall form press chambers, may be of any desired design, for example flattened, within a maximum geometric shape. In order to chambers of different sizes may arise, and it should be possible to bring each a specific chamber as a filling chamber with an input port for the asset to be juiced on the housing in combination. Thus, the device should be able to be set in such an advantageous manner that the filling chamber is the chamber with the cheapest receiving volume in consideration of the different consistency of the material to be juiced available. Appropriately, the desired setting is done manually electronically, including three switches are used, which are advantageously marked with symbols for the different Good. Similar pressing devices are known from GB 1 286 491 A , of the US 3,635,151 and the DD 7 86 36 known.

The problem underlying the invention

The invention has for its object to provide a pressing device, a pressing rotor or a compression housing for processing pressed material, which are improved over the prior art. In addition to be provided by an improved pressing device and an improved food processor. In particular, it should be achieved that the reliability, ease of use and longevity of such a pressing device, a press rotor or even a compression housing and a food processor can be increased.

Inventive solution

The reference numbers in all claims have no limiting effect, but are only intended to improve their readability.

The object underlying the invention is achieved by a press rotor according to claim 1, a press housing according to claim 2, a pressing device for processing pressed material according to claim 14, and a food processor according to claim 15.

A Wankel engine is an internal-axis rotary engine in Trochoidenbauart and as such in principle already known. Its compression principle with the rotor eccentrically rotating in the case but is also used for rotary engines in pressing devices for food processors, for example, to squeeze juice from fruits and to separate the liquid from the solid fruit components, as it is already known from some pre-published documents. Exemplary embodiments of such previously known press apparatuses of the Wankel engine type are known DE 1808420 A1 and US 3,625,151 A known. These documents are part of the present description with regard to the mold designs shown there, in particular of press housing and press rotor, and the general operation of the press device in the manner of a Wankel engine by quoting.

The pressing rotor is that component of the pressing device which can be set in motion by means of a transfer drive on a drive roller gear lying within its peripheral line on a gear wheel side facing the press rotor. As a result, the pressing rotor can essentially travel along the inside of the radial outer wall of the pressing housing, wherein a compression pressure on pressed material which can be located in the intermediate clearance is exerted by the reduction in distance taking place between the pressing rotor and the inner wall of the pressing housing in clock cycles. So the pressed material can be crushed or pressed. The press housing is corresponding to that part of the press device which houses the press runner.

In the context of the invention, processing of pressed material is understood as meaning the pressing out of air or liquid from the material to be compacted by the application of a compressive force or else only flattening of pressed material, in particular if the material to be pressed contains air inclusions or liquid. The pressed material can also be pureed or passed in the pressing device accordingly.

With compression pressure is meant in the context of this invention, the pressure between Inner wall of the radial outer wall of the press housing and press rotor is formed when the press rotor, driven by its inner axis as the drive axis, during the pressing process, its distance from the radial outer wall changes, in particular this approaches and compressed between the outer wall and press rotor a pressed material.

If a press rotor or a press housing for a pressing device, as provided according to the invention, has one or more pressure compensation means, so that the compression pressure occurring during the processing of the pressed material is regulated without intervention of a user, it can be achieved that the compression pressure which acts on the pressed material, is automatically regulated depending on the nature of the material to be pressed. Automatic means that without manual intervention by the user, the compression pressure is regulated during the pressing process. While in prior art solutions a user-side intervention was necessary to adjust the compression pressure to the compression material by a suitable portion of the press rotor is selected for pressing, according to the invention such an intervention is no longer necessary. For example, it can be prevented that hard pressed material obstructs the circulation of the press rotor and that an excessive amount of additional power is required to drive the press rotor. In some embodiments, in addition, the pressing out of material to be pressed can be more effective, because liquid can be discharged directly from the compression housing during the compression process, and not, as in known solutions, only at the end of the pressing cycle. If a pressing device has either such a press rotor or also such a press housing, or if a food processor has a pressing device with such a press rotor or also with such a press casing, the stated advantages can also be achieved for the pressing device or the food processor as a whole.

Preferred embodiment of the invention

Advantageous embodiments and developments, which can be used individually or in combination with each other, are the subject of the dependent claims.

A preferred pressing device is suitable for use in a food processor. As a result, the pressing device according to the invention can develop a particular benefit for the user of kitchen appliances. Preferably, it is a stand-up food processor. The pressing device can, however, in principle also be used on manual kitchen machines, such as, for example, hand mixers or stirring bars. Preferred kitchen machines are especially juicers or multifunction devices. In this case, the pressing device can be arranged in the housing part of the food processor, which also has a drive device for the press rotor, but alternatively also in a separate component, preferably in a separate article, for example in a releasably connectable processing vessel for a stand-up food processor. As a drive device for the pressing rotor is equally a manual drive, for example by means of a crank, or a motor drive, for example via an electric motor in question. Corresponding to use in a food processor, the material to be pressed is preferably a food, particularly preferably fruits or vegetables, such as apples, pears, carrots, grapes, oranges, lemons, tomatoes, cherries or strawberries. However, pressed material can also be grains or cereals which can be comminuted or ground in the pressing device between the press rotor and the press housing. Other possible uses can be found in industrial presses, for example in industrial presses for compressing and / or dehumidifying textiles, waste, soil or sludge.

It is preferred that the pressing rotor in a plan view along its drive axis has substantially the contour line of a triangle. Such shaped press runners are well known and tested. The side surfaces of the press rotor may be curved convexly or concavely in the radial direction, but also non-curved side surfaces are possible. In embodiments, all side surfaces of the press rotor are at least substantially identical in their surface shape, but preferably designed to be completely identical in this respect. The pressing rotor preferably has a ring gear on an inner circumferential line, which in a preferred embodiment is designed as a separate element and is connected to the pressing rotor via fastening means, for example screws or nails. In order to enable a stable seat of the sprocket in the press rotor, two or more fastening means are preferably provided, particularly preferably exactly three fastening means. These are preferably arranged at equal angular intervals, in three fastening means thus in a configuration in which the three fastening means form the vertices of an equilateral triangle. Other embodiments provide four, five or even six attachment means, which then respectively form the vertices of squares, equilateral pentagons or equilateral hexagons.

A preferred press housing includes one or more die feed openings and one or more die exit openings. These are preferably on a radial outer wall of the press housing, based on a Top view along a drive axis of the press rotor, arranged. By the known from the Wankel engine operating principle of a rotating within the press housing press rotor, the supplied pressed material is gradually compressed in a cycle in the press housing and at least partially from the or the Pressgutabführungsöffnungen reissued. One or more of the Pressgutabführungsöffnungen can also be used simultaneously for liquid removal. Preferably, however, a separate liquid discharge opening is present, so that liquid and processed pressed material can be dispensed by suitable arrangement of the discharge openings largely separated from each other, preferably in separate collecting container. In some embodiments, there is preferably exactly one press material removal opening and a plurality of liquid discharge openings adjacent thereto, preferably exactly six, which in each case provide smaller passage openings in the radial outer wall of the compression housing in comparison with the pressed product removal opening. Thus, liquid and pressed pressed material can leave the press housing separately from each other. The one or more separate liquid discharge openings, which are preferably present, are preferably preceded by the press material removal opening or openings, preferably in relation to the transport direction of the material to be pressed in the press housing.

Preferably, pressure compensation means are arranged on the press rotor. Thus, an existing pressing device can be easily and inexpensively provided with a new press rotor to be able to use in existing presses the resulting benefits of pressure compensation means. Pressure compensation means on the press rotor can allow high mechanical resistances to be reduced during the rotation of the press rotor, as can be caused by relatively hard material to be compacted. For example, elastically deformable or elastically compressing pressure compensation means may be present, preferably as wall sections arranged on a peripheral line of the press rotor. These can give way, for example, if the backpressure is too high, so that nevertheless a further rotation of the press rotor is made possible. The life of a pressing device can thus be increased and its reliability can be increased. Embodiments of other pressure balance means may provide orifices in the squeeze rotor so that squeezed liquid may flow out of the squeeze housing through the wall of the squeeze rotor.

In a preferred embodiment, pressure compensation means arranged on the pressing rotor form gaps in the pressing rotor. Such intermediate spaces can bring different advantages in each case in different embodiments. For example, the pressure compensation means may be designed as wall segments, one end of which is free and whose other end is connected to the body of the press rotor. In other embodiments, the pressure equalizing means are connected at both laterally spaced ends to the body of the press rotor, with a space formed in the body between the ends. In a triangular-shaped press rotor in the plan view along its drive axis, the wall segments preferably extend substantially parallel to the triangular outer contour of the body of the press rotor. It is very particularly preferred that the wall segment runs as a pressure compensation means parallel to a wall of the body and that there is a gap between sections of the pressure compensation means and the wall of the body. Preferably, the wall segment is made of an elastic material, for example spring steel, so that when the pressure acts radially from the outside to the center of the press rotor, the wall segment elastically springs into the intermediate space with its free end and then returns to its preloaded initial position. In another embodiment, however, the spaces are one or more openings on the radially outer wall surface of the press rotor, for example, slot or punctiform openings, which allow an inflow of liquid into the press rotor and through it. Thus, liquid that collects during the pressing of, for example, fruits in the press housing, are discharged directly during the pressing process, whereby the pressure in the press housing can drop. In this way, the resistance during rotation of the press rotor can be reduced, so that the energy requirement can decrease during operation.

Preferably, the spaces are filled with a filling material. This embodiment is preferred when the clearances are those created by wall-like pressure compensating means connected at one end to the body of the press rotor and which are capable of springing into the space with their other end. One or more of the interspaces are preferably filled with a polymeric material. Thus, the penetration of pressed material or liquid can be prevented in the interstices. This can also be used for the wall segment a possibly non-elastic material, possibly a very rigid or plastically deforming material, when the filler itself is so elastic that it still allows an elastic yielding when compression pressure occurs. Alternatively, however, the gaps can also contain no filler material, so be filled only with ambient air.

Preferably, the intermediate spaces formed on the press rotor represent one or more passage openings for liquid pressed out of the pressed product so that pressed-out liquid can flow out of the pressing device through the press rotor. In this embodiment of the interstices, the interspaces in the press rotor form connecting channels which lead outwards from the inside of the press housing, in order to be able to discharge liquid through the press runner out of the press housing. The connecting channels can be formed, for example, in that the pressing rotor has a multiplicity of adjacent, mutually spaced webs, which in their entirety represent pressure compensation means. Preferably, the squeegee comprises at least one wall having a plurality of adjacent, spaced apart webs so that the wall constitutes a pressure balance means. The webs preferably run parallel to the inner axis, ie the drive axis, of the press rotor and at the same time parallel to one another. So they form slit-like spaces. It is preferred that the wall comprising the webs bounds the body of the press rotor radially outwardly. Through the spaces between the webs, for example, liquid can then flow from the surface of the peripheral line of the press rotor through the body of the press rotor and leave the press device in this way. A preferred distance between two webs is greater than 0.3 mm, preferably greater than 0.7 mm, preferably greater than 1 mm, preferably greater than 2 mm or even preferably greater than 3 mm. On the other hand, a preferred distance between two webs is less than 5 mm, preferably less than 3 mm, preferably less than 2 mm, preferably less than 1 mm or even preferably less than 0.5 mm. By a suitable choice of the distance of the webs of the back pressure, which generates the pressing rotor relative to the pressed material and the squeezed liquid can be influenced. Alternatively, the connecting channels may be implemented by a lattice structure on a framework which defines the outer contour of the press rotor or by one or more hole-like openings in a solid block of material from which the press rotor is formed, or in outer walls of the press rotor, instead of by webs. Thus, it is also possible for circular or otherwise shaped passage openings to be present on the press rotor.

If one or more passage openings for liquid are present in the press rotor, it is preferably provided that only exactly one press material supply opening and exactly one press material removal opening is present in the press housing. Other openings may be omitted, since the squeezed liquid can escape through the press rotor and the Pressgutabführungsöffnung exclusively a single container must be downstream in order to catch the pressed-out pressed material on the outside of the press housing can.

Preferably, a plurality of passage openings for liquid pressed out of the pressed material is formed on the circumferential line of the press rotor. Due to the multiplicity of through openings, liquid can accelerate out of the press housing through the press rotor. More preferably, more than 2, preferably more than 5, preferably more than 20, preferably more than 50 and most preferably more than 100 passages on the press rotor, preferably on its peripheral line, based on a viewing direction along the drive axis of the press rotor, available. In embodiments in which the squeegee has passageways for squeezed liquid, in particular a plurality of passageways, it is preferred that the radial outer wall of the squeeze housing is closed along the entire perimeter except for a single squeegee feed opening and a single squeegee discharge opening such that the radial outer wall is sufficient Compression pressure in conjunction with the press runner can produce. Accordingly, it is also provided in particular for this case, that the radial outer wall of the compression housing is integrally formed, or is formed in several pieces, in which case, however, the plurality of elements that form the radial outer wall are preferably substantially rigidly interconnected.

It is preferred that pressure compensation means are arranged on the press housing. These may be present in addition to or as an alternative to pressure compensation means on the press rotor. On the press housing, because the press housing does not have to be set in motion for pressing, they can be designed to be particularly stable or massive, which can extend the service life of a press device.

Preferably, the pressure compensation means on the compression housing are designed as one or more elastically mounted wall segments of the compression housing. It is preferred that the compression housing is not limited radially by a continuous wall, but two or more wall segments. If one of them is elastically mounted, it can swing out radially outward, preferably at a specified excessive pressure, so that the rotation of the press rotor is hampered only to a reduced extent, for example, a particularly large or even solid piece of pressed material, for example a relatively large one Piece of apple, to be juiced in the press housing. It is particularly preferred that exactly one wall segment is elastic is mounted opposite the press housing. In other embodiments, two wall segments are resiliently mounted against the press housing. However, it is also possible to store three, four, five, six or even more wall segments together or in each case elastically with respect to the compression housing itself or with respect to other wall segments, especially if a very precise local compensation of the compression pressure is to take place. In some embodiments, openings are provided in the elastic wall segments through which liquid or pressed material to be pressed out of the compression housing can escape to the outside. These openings are preferably present in addition to the already known Pressgutabführungsöffnungen and liquid discharge openings, which leave at the end of the pressing process pressed material and liquid from the compression housing, in a portion of the radial outer wall of the compression housing, which is located between Pressgutzuführungsöffnung and Pressgutabführungsöffnung and upstream of the liquid discharge opening.

It is preferred that a first wall segment of a radial outer wall of the press housing has a first position, via which it is elastically mounted on a second wall segment of the radial outer wall of the press housing, and in that the first wall segment has a second point, via which it also on the second Wall segment is mounted, or over which the first wall segment is mounted on a third wall segment of the radial outer wall of the press housing. A corresponding pressing device therefore preferably has a compression housing whose radial outer wall is formed by two or three wall segments. It is preferred that the first wall segment via two screws, which are each enclosed by a coil spring, is elastically mounted at the first location on the second wall segment of the press housing. The first wall segment is preferably arranged radially adjacent to a space region within the press housing in which compression takes place in a Wankel engine and also in the present press device. Usually, this space area is close to the pressing material supply opening. If a compression force determined by the spring force is exceeded, the first wall segment can swing out radially against the bias of the spring. Thus, the compression pressure in the compression housing can be reduced and the rotation of the press rotor can be continued without resistance, so that material fatigue and energy consumption can be reduced. At a second location, the first wall segment, for example, rigidly connected to the third wall segment, preferably by welding, screws, nails or rivets. But it can also be connected at the second point elastically displaced radially outward with the third wall segment. This third wall segment may in turn be mounted on a further elastic wall, preferably in the manner described above, on further wall segments, preferably on the second wall segment of the press housing. It is thus possible for one or more wall segments of the press housing to swing out radially outwards over a limited distance from a rest position, provided, for example, that the compression pressure in the interior of the press housing exceeds a certain limit value. In this case, either each individual wall segment can be displaced elastically or wall segments combined into groups can be displaced together.

Preferably, openings are formed on the radial outer wall of the press housing, which are adapted to releasably receive grid elements and in this way to create a permeable barrier for liquid and / or Pressgutstücke. This may have the advantage that due to the radial outer wall, liquid can run to the outside, which otherwise may have an increase in the pressure, in particular in the compression region of the compression housing. Another advantage may be that solid material to be pressed, such as grain, can be crushed by suitable grating elements, so that the grain can emerge as a fine dust or at least coarse-grained litter through the inner wall of the compression housing to the outside. Therefore, it may be useful if the user uses a different grid element depending on the pressed material. It can fine metal nets or coarser grid, formed from spaced struts, come with relatively large openings used. As a result, different sized pieces of pressed material can pass through the radial outer wall of the press housing to the outside. Preferably, the opening is designed such that the grid element is inserted and supported from the inside of the radial outer wall on the radial outer wall. Thus, the radially outwardly acting pressure on the grid element can be advantageously absorbed by the radial outer wall of the compression housing. The grid element may be designed by its amount of stitching so that essentially only liquid can pass through. Pressgutstücke are preferably retained and transported by the rotating press rotor. In embodiments, the openings are formed only in portions of the radial outer wall. But there are also one or more as an annular gap radially encircling openings possible. It is preferred that the opening for the grid element is arranged in a wall segment that is elastically radially outwardly displaceable relative to the press housing. In some embodiments, the radial outer wall of the compression housing itself is designed as a lattice structure, for example, when no replaceable lattice elements are desired or a particularly stable design of the grid structure to be provided.

It is preferred that, starting from the radial outer wall of the press housing, a protruding into the interior of the press housing, elastically mounted projection is arranged to strip adhering pressed material from the press rotor. Such a projection may help to prevent the pressed material adhering to the press rotor there from possibly adding existing passage openings for liquid or reducing the pressing force of the press rotor. Thus, the force effect of the press rotor and the flow rate of the liquid through the outer wall of the press rotor remain almost consistently well even with prolonged continuous operation. Preferably, either the projection itself is made elastic, so for example as an elastic metal sheet or as a rubber lip, or it is with the interposition of an elastic member, for example, using a coil spring, elastically attached to the inside of the radial outer wall.

In a preferred embodiment, the projection for stripping the press rotor is integrally formed on an elastically mounted wall segment of the press housing, so that the projection is mounted elastically together with the wall segment relative to the rest of the press housing. In this way, a particularly inexpensive scraper can be created. For example, it can be cast together with the wall segment or molded onto the wall segment. Also, a particularly space-saving design is made possible in this way, since no holding elements are required for the scraper, which would possibly protrude beyond the outer contour of the press housing. It is preferred that the scraper is integrally formed on a wall segment of the radial outer wall, which also includes the Pressgutabführungsöffnung. Thus, by the scraper from the press rotor stripped pressed material can be delivered directly on the Pressgutabführungsöffnung to the outside.

Brief description of the drawings

Further advantageous embodiments of the invention will be described in more detail with reference to embodiments illustrated in the drawings, to which the invention is not limited.

They show schematically:

1 an oblique view of a first embodiment of a pressing device according to the invention;

2 a first detail view of the first embodiment;

3 a second detail view of the first embodiment;

4 a third detail view of the first embodiment;

5 a schematic cross-sectional view of a press rotor of a second embodiment;

6 an oblique view of a third embodiment of a pressing device according to the invention;

7 a first detail view of the third embodiment;

8th a second partial view of the third embodiment;

9 a first oblique view of a press rotor of the third embodiment; and

10 a second oblique view of a press rotor of the third embodiment.

Detailed description of embodiments of the invention

The 1 and 6 show two different embodiments of a pressing device according to the invention 1 with press rotors according to the invention 2 and / or press housings 3 , 5 shows an embodiment of a press rotor 2 in one embodiment of a pressing device 1 can be used with the out 1 functionally comparable. The 2 . 3 . 4 and 7 to 10 each show details of embodiments that may be of particular importance to the invention.

Both embodiments of a pressing device 1 after the 1 and 6 have in common that these are pressing devices 1 for use in food processors (not shown). They are therefore suitable for processing food. However, it will be clear to those skilled in the art that by suitable size scaling, such pressing devices 1 can also be used for industrial presses. The operating principle of the Wankel engine is used as the pressing mechanism for processing the food. For this purpose, the pressing device 1 one press housing each 3 and in its interior one by an inner axis 3 via a sprocket drivable pressing rotor 2 on. In the present cases, the pressing rotor 2 by an electric motor of Food processor driven. This allows him to move around the inner axis 4 eccentrically rotating in the press housing 3 circulate, substantially along the inside of the radial outer wall 5 of the press housing 3 , which is designed for this purpose after known Trochoidenbauart. The press rotor 2 has in all shown embodiments in a viewing direction along its drive axis, the inner axis 3 , essentially the contour line of an equilateral triangle. By means of compression pressure, the circulation of the press rotor 2 in the press housing 3 between outer wall of the press rotor 3 , in this case one of the triangle sides, and inside the radial outer wall 5 of the press housing 3 is produced, pressed material is processed, so that the compression housing 3 and the press rotor 2 cooperate in such a way that they form an internal-axis rotary piston machine in Trochoidenbauart.

The problem with such pressing devices 1 be that the generated compression pressure may be too small or too large, depending on which pressed material in the pressing device 1 processed. A previously known solution is that by manual selection via push buttons on the food processor a baling chamber volume is adjusted to match the pressed material. These are the outsides of a triangular press rotor 2 flattened differently in the previously known solution, so that forms depending on the selected outer for pressing a different compression chamber volume. A disadvantage may be that the user can forget to select the appropriate setting and thus fails the press result unsatisfactory or even, for example, in the case of overdose of pressure, damage to the food processor is caused or increased energy demand for driving the press rotor 2 can occur.

To solve this problem, it is provided that the pressing device 1 and thus also a food processor equipped with such a pressing device 1 one or more pressure compensation means 6 has, so that without intervention of a user occurring during processing of the material to be pressed compression pressure, ie pressure between the press rotor 2 and press housing 3 inside the press housing 3 is built up, regulated. This can be achieved in that the pressing rotor 2 or the press housing 3 with such pressure compensation agents 6 are equipped. The user then no longer has to become active himself to the pressure within the press housing 3 suitable to adjust. The pressure is automatically, without user intervention, by the pressure compensation means 6 customized. This makes the pressing process more thorough, more comfortable, safer, more energy-efficient or gentle on the material.

According to the first embodiment 1 are pressure compensators 6a on the press housing 3 arranged. They are as several elastically mounted wall segments of the press housing 3 executed. The press rotor 2 is completely equipped with solid, liquid-impermeable walls. A first wall segment 7 of the press housing has a first place 8th on top of it on a second wall segment 9 of the press housing 3 is elastically mounted. In addition, the first wall segment 7 a second place 10 on top of it on a third wall segment 11 of the press housing 3 is stored. The first wall segment 7 and the third wall segment 11 are rigidly connected with fixing screws. The third wall segment 11 is in turn on the second wall segment 9 elastically stored. The elastic bearings are each about two adjacent screws 12a . 12b realized, each by a coil spring 13a . 13b be surrounded, as in particular in the 2 and 4 can be seen. Against the bias of the coil springs 13a . 13b can be the first wall segment 7 and the third wall segment 11 together as a group of wall segments relative to the second wall segment 9 be elastically pivoted radially outward. Due to the restoring force of the coil springs 13a . 13b become the first wall segment 7 and the second wall segment 9 automatically returned after pivoting in its unverschwenkte starting position, provided that the compression pressure falls below a critical threshold, which is related to the spring constant of the compression springs.

In a modification of the first embodiment according to 1 with the press rotor 2 out 5 are pressure compensators 6b on the press rotor 2 designed as wall segments whose first end 14 is free and its second end 15 with the body 16 of the press rotor 2 connected is. These pressure compensation agents 6b thus form essentially the triangular outer contour of the press rotor 2 to, run parallel to the outer contour of the body 16 of the press rotor and form a gap in sections 17a with this off. In the first embodiment, the pressure compensation means 6b made of a plastic, leaving it from the first end 14 elastic in the respective space 17a can spring down. The gaps 17a can in support of the elastic springing of the pressure compensation agent 6b be filled, for example with a polymeric material. In the present case, however, no material is in the gap 17a filled. Comes the press rotor 2 out 5 are used, preferably not elastically radially outwardly displaceable wall elements as pressure compensation means 6a in the press housing 3 available. The radial outer wall 5 of the press housing 3 is in this case made in one piece (not shown) and the pressure equalization thus does not take place over the movable wall segments of the press housing 3 as a pressure compensation agent 6a , but on the displaceable wall segments of the press rotor 2 as a pressure compensation agent 6b ,

In the embodiment according to 6 are on the press rotor 2 Pressure equalizing means 6c arranged. They form spaces 17b in the press rotor 2 out, like in the 9 and 10 is particularly clear. The gaps 17b However, they are designed as a plurality of passage openings for liquid pressed out of the pressed material, so that liquid pressed out in this embodiment by the pressing rotor 2 through from the pressing device 1 can flow out. At the circumference of the press rotor 2 is formed in the second embodiment, a plurality of passage openings for pressed out of the pressed material liquid. The passage openings provide connection channels through the press rotor to the outside of the press device. The press rotor 2 has at least one wall with a plurality of adjacent, spaced-apart webs 18 on, so that each of these walls a pressure balance 6c represents. In the present case, the radial outer walls of the press rotor 2 , relative to a viewing direction along the inner axis 4 of the press rotor 2 with spaced webs 18 provided, the spaces between them 17b form. The bridges 18 run parallel to the inner axis accordingly 4 and at the same time parallel to each other. The walls, the bridges 18 have, limit the body 16 of the press rotor 2 radially outward. The gap 17b between two bars each 18 through which the footbridges 18 spaced apart, has an amount of about 2 mm. Through the gaps 17b between the bridges 18 can liquid from the surface of the perimeter of the press rotor 2 through the body 16 of the press rotor 2 flow through and in this way the pressing device 1 leave. Even so, an automatic pressure equalization can be done, because squeezed liquid can by the press rotor 2 through at any time the pressing device 1 leave and thus contributes only temporarily to the compression pressure within the press housing 2 at.

Depending on the design of the press rotor 2 can the configuration of the radial outer wall 5 of the press housing 3 be elected. Instead of a solid, fully closed and liquid-impervious press rotor 2 as in the example 1 a press rotor 2 after the 9 and 10 is possible in embodiments that in the radial outer wall 5 of the press housing 3 only exactly one press supply opening 19 and exactly one Pressgutabführungsöffnung 20 is present, through the pressed material in the pressing device 1 filled, or after its processing again from it can be spent, in particular in 6 can be seen. Apart from the pressing material supply opening 19 and the Pressgutabführungsöffnung 20 is the radial outer wall 5 of the press housing 3 completely closed and liquid-tight, as in 7 and in 8th can be seen, since the liquid through the press rotor 2 through from the press housing 3 can escape. Are, according to the embodiment according to 1 or with the press rotor 2 to 5 but no spaces 17b as passages for liquid in the squeezer 3 provided, it makes sense in the radial outer wall 5 of the press housing 3 a plurality of openings as pressure equalizing means 6d provided by the liquid from the pressing device 1 out, especially in the 1 and 3 can be seen. The openings are at a portion of the radial outer wall 5 between the pressing material supply opening 19 and the originally single Pressgutabführungsöffnung 20 arranged. Also in this way can thus in the pressing device 1 an automatic pressure regulation be made.

Such as in the 1 and 3 can be seen and described above, on the first wall segment 7 or on the third wall segment 9 the radial outer wall 5 of the press housing 3 a pressing device 1 Passages be provided for liquid or pressed compact. It is preferred that on the radial outer wall 5 of the press housing 3 Openings are formed, which are adapted to releasably receive grid elements and to create in this way a permeable barrier for liquid and / or Pressgutstücke. In the present embodiments, the wall segments 7 . 9 but even designed as a grid elements. However, it will be apparent to those skilled in the art that, as an alternative or in addition, larger apertures could be present in comparison to the apertures shown in which different types of grid members may be releasably used. Through the openings in the wall segments 7 . 9 The radial outer wall can escape liquid or crushed pressed material, so that the compression pressure is no longer affected by these deposited parts. As in 3 can be seen are in the third wall segment in this embodiment 11 the radial outer wall 5 of the press housing 3 provided several passages for liquid. These are the Pressgutabführungsöffnung 20 in the transport direction of the material to be pressed, which in this case runs clockwise, upstream. Is pressed material and liquid thus by the press rotor 2 transported further, first liquid flows through the five passage openings, which are however selected in size so that pressed material can pass at most to small proportions. The largest part of the pressed material, So at least half, is then on the downstream Pressgutabführungsöffnung 20 ejected.

6 shows that in embodiments of the radial outer wall 5 of the press housing 3 starting in the interior of the press housing 1 protruding, elastically mounted projection 21 is arranged to adhering pressed material from the press rotor 2 slough. This is especially useful if the press rotor 2 Has passage openings for liquid. Thus, a contribution is made that these passages are not clogged with pressed material. The lead 21 for the press rotor 2 is integral to an elastically mounted wall segment of the press housing 3 , which is also the Pressgutabführungsöffnung 20 includes, molded, so that the projection 21 is elastically mounted together with the wall segment relative to the rest of the press housing. In this case, this is the third wall segment 9 , As in 6 can be seen, there is in the radial outer wall 5 of the press housing 3 exactly one press supply opening 19 and exactly one Pressgutabführungsöffnung 20 because of the press rotor 2 according to 7 and 8th Passageways for liquid on, leaving the radial outer wall 5 of the press housing 3 can dispense with such openings. Therefore, in comparison to 3 this in 10 shown wall segment, in this case as a third wall segment 9 referred to, in addition to a single Pressgutabführungsöffnung 20 no separate openings for liquid.

A pressing process, illustrated by the example of a food processor with a handful of grapes as pressed material, thus follows as follows: The user fills the grapes through the pressing material supply opening 19 in the press housing 3 the pressing device 1 the food processor. It activates the pressing mechanism by activating the motor of the food processor, which makes the press rotor 2 , through the inner axis 4 driven, a first clockwise clockwise within the press housing 3 voranrotiert. This is a first time the material to be pressed between the outer wall of the press rotor 2 and inner wall of the radial outer wall 5 of the press housing 3 compressed. Grape juice comes out of the grapes. Already now, the grape juice, depending on the embodiment, either between openings in the press rotor, as a pressure balance 6c act through openings in the radial outer wall of the press housing, which serves as a pressure compensation means 6d function, flow out, which can cause the compression pressure in the compression housing to drop. In other embodiments, either on the press rotor 2 or on the press housing 3 arranged, elastically pivotable wall segments as pressure compensation means 6a and / or pressure compensation means 6b give the compression pressure, whereby a predetermined maximum pressure can remain below. In a second cycle step, the pomace is advanced and then compressed again. In a third step, the pomace is still further to the Pressgutabführungsöffnung 20 moved out there and falls out of the press housing 3 out. He can be very strong juiced.

The present invention thus teaches a pressing device 1 or a press rotor 2 or a press housing 3 for a pressing device 1 for processing of pressed material, wherein pressing rotor 2 or also compression housing 3 one or more pressure compensation means 6a . 6b . 6c . 6d have, so that without intervention of a user when editing the material to be pressed within the press housing 3 occurring compression pressure regulated. It can be advantageous in this case that excessive compression pressure can be avoided, thereby reducing energy consumption or even the durability of press runners 2 , Press housing 3 and pressing device 4 can be increased. The features disclosed in the foregoing description, the claims and the drawings may be of importance both individually and in any combination for the realization of the invention in its various forms.

LIST OF REFERENCE NUMBERS

1

 pressing device

2

 Press runners

3

 Press housing

4

 interior axis

5

 radial outer wall

6a, b, c, d

 Pressure equalizing means

7

 first wall segment

8th

 first place

9

 second wall segment

10

 second place

11

 third wall segment

12a, b

 screw

13a, b

 coil spring

14

 first end

15

 second end

16

 corpus

17a, b

 gap

18

 web

19

 Pressgutzuführungsöffnung

20

 Pressgutabführungsöffnung

21

 head Start

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 1808420 A [0002]
• GB 1286491 A [0002]
• US 3635151 [0002]
• DD 78636 [0002]
• DE 1808420 A1 [0006]
• US 3625151 A [0006]

Claims (15)

Pressing rotor ( 2 ) suitable for a pressing device ( 1 ) for processing of pressed material, preferably of food, which uses the operating principle of the Wankel motor for processing the pressed material in a pressing mechanism and for this purpose a compression housing ( 3 ) and in its interior the drivable pressing rotor ( 2 ), wherein the pressing rotor ( 2 ) about an inner axis ( 4 ) eccentrically rotating in the press housing ( 3 ) can circulate to between a radial outer wall ( 5 ) of the compression housing ( 3 ) and an outer wall of the press rotor ( 2 ) to process the material to be pressed by means of compression pressure, so that the compression housing ( 3 ) and the pressing rotor ( 2 ) in such a cooperatively form an internal-axis rotary piston machine in Trochoidenbauart, characterized in that the pressing rotor ( 2 ) one or more pressure compensation means ( 6b . 6c ), so that, without intervention of a user, the compression pressure occurring during the processing of the material to be pressed is regulated. Press housing ( 3 ) suitable for a pressing device ( 1 ) for processing of pressed material, preferably of food, which uses the operating principle of the Wankel motor for processing the pressed material in a pressing mechanism and for this purpose the compression housing ( 3 ) and in its interior a drivable pressing rotor ( 2 ), wherein the pressing rotor ( 2 ) about an inner axis ( 4 ) eccentrically rotating in the press housing ( 3 ) can circulate to between a radial outer wall ( 5 ) of the compression housing ( 3 ) and an outer wall of the press rotor ( 2 ) to process the material to be pressed by means of compression pressure, so that the compression housing ( 3 ) and the pressing rotor ( 2 ) cooperatively form an internal-axis rotary piston machine of the trochoid type, characterized in that the compression housing ( 3 ) one or more pressure compensation means ( 6a . 6d ), so that, without intervention of a user, the compression pressure occurring during the processing of the material to be pressed is regulated. Pressing rotor ( 2 ) or press housing ( 3 ) according to claim 1 or 2, characterized in that pressure compensation means ( 6b . 6c ) on the press rotor ( 2 ) are arranged. Pressing rotor ( 2 ) or press housing ( 3 ) according to one of the preceding claims, characterized in that the press rotor ( 2 ) arranged pressure compensation means ( 6b . 6c ) Spaces ( 17a . 17b ) in the press rotor. Pressing rotor ( 2 ) or press housing ( 3 ) according to claim 4, characterized in that the spaces ( 17a ) are filled with a filling material. Pressing rotor ( 2 ) or press housing ( 3 ) according to claim 4, characterized in that the press rotor ( 2 ) formed spaces ( 17b ) represent one or more passage openings for liquid pressed out of the pressed material, so that liquid pressed out by the pressing rotor ( 2 ) through from the pressing device ( 1 ) can flow out. Pressing rotor ( 2 ) or press housing ( 3 ) according to claim 6, characterized in that on the peripheral line of the press rotor ( 2 ) is formed a plurality of passage openings for liquid pressed out of the pressed material. Pressing rotor ( 2 ) or press housing ( 3 ) according to one of claims 1, 3, 4, 5, 6 or 7, characterized in that pressure compensation means ( 6a . 6d ) on the compression housing ( 3 ) are arranged. Pressing rotor ( 2 ) or press housing ( 3 ) according to one of the preceding claims, characterized in that the pressure compensation means ( 6a . 6d ) on the compression housing ( 3 ) as one or more elastically supported wall segments ( 7 . 9 ) of the press housing are executed. Pressing rotor ( 2 ) or press housing ( 3 ) according to claim 9, characterized in that a first wall segment ( 7 ) a radial outer wall ( 5 ) of the compression housing ( 3 ) has a first location over which it is attached to a second wall segment ( 9 ) of the radial outer wall ( 5 ) of the compression housing ( 3 ) is elastically mounted, and that the first wall segment ( 7 ) has a second location over which it is also on the second wall segment ( 9 ) is stored, or over which the first wall segment ( 7 ) on a third wall segment ( 11 ) of the radial outer wall ( 5 ) of the compression housing ( 3 ) is stored. Pressing rotor ( 2 ) or press housing ( 3 ) according to one of the preceding claims, characterized in that on the radial outer wall ( 5 ) of the press housing openings are formed, which are adapted to releasably receive grid elements and to create in this way a permeable for liquid and / or Pressgutstücke barrier. Pressing rotor ( 2 ) or press housing ( 3 ) according to one of the preceding claims, characterized in that of the radial outer wall ( 5 ) of the compression housing ( 3 ) starting in the interior of the press housing ( 3 ) protruding, elastically mounted projection ( 21 ) is arranged to prevent adhering pressed material from the press rotor ( 2 ) strip. Pressing rotor ( 2 ) or press housing ( 3 ) according to claim 12, characterized in that the Head Start ( 21 ) for stripping the press rotor ( 2 ) in one piece on an elastically mounted wall segment ( 7 . 9 ) of the compression housing ( 3 ), so that the projection ( 21 ) together with this wall segment ( 7 . 9 ) with respect to the rest of the compression housing ( 3 ) is elastically mounted. Pressing device ( 1 ) for processing of pressed material, preferably of food, which uses the operating principle of the Wankel motor for processing the pressed material in a pressing mechanism and for this purpose a compression housing ( 3 ) and in its interior a drivable pressing rotor ( 2 ), wherein the pressing rotor ( 2 ) about an inner axis ( 4 ) eccentrically rotating in the press housing ( 3 ) can circulate to between a radial outer wall ( 5 ) of the compression housing ( 3 ) and an outer wall of the press rotor ( 2 ) to process the material to be pressed by means of compression pressure, so that the compression housing ( 3 ) and the pressing rotor ( 2 ) cooperatively form an internal-axis rotary piston machine of the trochoid type, with a pressing rotor ( 2 ) according to claim 1 and / or a compression housing ( 3 ) according to claim 2. Food processor for juicing and / or comminuting food with a press device ( 1 ) according to claim 14.

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